1616240 has 40 divisors (see below), whose sum is σ = 3816720. Its totient is φ = 636416.

The previous prime is 1616231. The next prime is 1616269. The reversal of 1616240 is 426161.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1616240² = 5224463475200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7007 + ... + 7233.

It is an arithmetic number, because the mean of its divisors is an integer number (95418).

2^1616240 is an apocalyptic number.

1616240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1616240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1908360).

1616240 is an abundant number, since it is smaller than the sum of its proper divisors (2200480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1616240 is a wasteful number, since it uses less digits than its factorization.

1616240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1616240 is about 1271.3142805774. The cubic root of 1616240 is about 117.3550952519.

The spelling of 1616240 in words is "one million, six hundred sixteen thousand, two hundred forty".